1   /* Copyright 2002-2023 CS GROUP
2    * Licensed to CS GROUP (CS) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * CS licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *   http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.orekit.bodies;
18  
19  import java.io.Serializable;
20  
21  import org.orekit.frames.Frame;
22  import org.orekit.utils.ExtendedPVCoordinatesProvider;
23  
24  /** Interface for celestial bodies like Sun, Moon or solar system planets.
25   * @author Luc Maisonobe
26   * @see CelestialBodyFactory
27   */
28  public interface CelestialBody extends Serializable, ExtendedPVCoordinatesProvider {
29  
30      /** Get an inertially oriented, body centered frame.
31       * <p>The frame is always bound to the body center, and its axes have a
32       * fixed orientation with respect to other inertial frames.</p>
33       * @return an inertially oriented, body centered frame
34       * @see #getBodyOrientedFrame()
35       */
36      Frame getInertiallyOrientedFrame();
37  
38      /** Get a body oriented, body centered frame.
39       * <p>The frame is always bound to the body center, and its axes have a
40       * fixed orientation with respect to the celestial body.</p>
41       * @return a body oriented, body centered frame
42       * @see #getInertiallyOrientedFrame()
43       */
44      Frame getBodyOrientedFrame();
45  
46      /** Get the name of the body.
47       * @return name of the body
48       */
49      String getName();
50  
51      /** Get the attraction coefficient of the body.
52       * @return attraction coefficient of the body (m³/s²)
53       */
54      double getGM();
55  
56  }